Sharon, I just learned that Michael Hardings Flake white #2 is now ground in saflower oil and the flake white#1 is ground in linseed oil, but both contain a small amount of zinc. I paint on canvas covered masonite that is lead primed, so I'm safe. The Michael Harding website is a little misleading as to what oil it's ground in. I bought both kinds of Flake white and read the label. I prefer the flake white #1 because it dries faster.
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